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Leominster Weather by Month
Average temperatures, rainfall and humidity for Leominster, United States, month by month, built from OpenWeather's historical records. Use it to see what a typical Leominster month looks like before you travel — then check the live Leominster forecast for the days ahead.
Warmest month
July
28°C average high
Coolest month
January
-6°C average low
Wettest month
May
108 mm of rain
Driest month
February
39 mm of rain
Average temperature and rainfall in Leominster by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 2°C | -6°C | -22°C / 20°C | 69 mm | 71% | 15 km/h |
| February | 3°C | -5°C | -25°C / 22°C | 39 mm | 69% | 15 km/h |
| March | 8°C | -1°C | -18°C / 24°C | 64 mm | 64% | 16 km/h |
| April | 14°C | 4°C | -9°C / 33°C | 84 mm | 64% | 15 km/h |
| May | 21°C | 10°C | 0°C / 34°C | 108 mm | 68% | 13 km/h |
| June | 25°C | 15°C | 4°C / 37°C | 88 mm | 71% | 11 km/h |
| July | 28°C | 18°C | 11°C / 36°C | 89 mm | 75% | 11 km/h |
| August | 27°C | 17°C | 9°C / 41°C | 80 mm | 76% | 10 km/h |
| September | 23°C | 13°C | 2°C / 34°C | 83 mm | 78% | 10 km/h |
| October | 17°C | 8°C | -7°C / 29°C | 90 mm | 77% | 11 km/h |
| November | 10°C | 1°C | -13°C / 25°C | 75 mm | 71% | 14 km/h |
| December | 5°C | -2°C | -19°C / 19°C | 94 mm | 75% | 14 km/h |
Best time to visit Leominster
The most comfortable time to visit Leominster is generally June and August to September, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around May, totalling about 964 mm a year.
Travellers who prefer heat should aim for July, when highs average 28°C. May is the month to avoid if rain would spoil your plans — it averages 108 mm, roughly 3× the rainfall of February.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Leominster forecast for what is happening now.